Usually it has something to do with chafing or some other skin issue. The best thing to use is one of those penis health cremes that are on the market nowadays. They are made specifically for the penis skin and treat discoloration, rashes, chafing, dryness etc. They are very helpful. Good luck.
Inflammation or discoloration around the opening in your penis may be due to infection, irritation or allergy. See your health care provider for accurate diagnosis.
There are many reasons why tooth discoloration work. Constant staining from favorite drinks and foods cause this tooth discoloration process.
Go to your local Health Department first and get a check-up and get tested for STD's. The nurse practitioner will be able to determine if you need to see a specialist and if you do they will refer you to the correct doctor.
Ues
Polycystic ovarian syndrome may include discoloration of the skin. This discoloration is known as acanthosis nigricans, and is typically found on the back of the neck, groin, and armpits.
Possibly. The nerves around the anus are the same or run parallel to the ones in the penis. This could cause a sympathetic pain in the penis.
Some rare cases yes, could be for the penis touching the back side of the vagina?
Herpes, genital warts, mosquitos, other STIs
It could be potentially dangerous to attach a TENS unit on your penis. If the unit is not adjusted properly it may cause permanent damage
Tetracycline
chlamydial infection
Blood flowing out of your penis. Your penis is a balloon.